Fast dyeing



Patented @ct. i022.

VICTOR VILLIGER AND HEINRICH VON KRANNICHIELDT, 0F LUDWIGSHAFEN-ON-THE- BHINE, GERMANY, ASSIGNORS T0 'BADISCHE ANILZN- 6t SODA-PARKER, 0E LUD- WIGSHAFEN-ON-THE-RHINE, GERMANY, ACORPORATION 0F GERMANY. V

FAST DYEING.

We Drawing.

To all whom it may concern:

Be it known that we, VIo'ron VILLIGER and HEINRICH VON KRANNICHFELDT, citizens of the Swiss Republic, residing at Ludwigshafen-on-the-Rhine, Germany, have invented new and useful lmprovementsiin Fast Dyeing for which we have filed an application in ermany April 28, 1917), of which the following is a specification.

Our invention relates to methods of dyeing and printing with certain coloring matters.

In the specification of the co-pending application, berial No. 395,182, a green condensation product is described which can be obtained from alpha-napthoquino-ne for example by suitably heating inthe presence of water.

We have now found that by means of the said green product excellent fast shades can be produced on both vegetable and animal fibers. The dyeing can be effected from the yellow vat of the green product, or by the padding or printing methods used with vat dyestuffs. Fiber'which has been thus incorporated with the aforementioned green 001- oring matter can be recognized by the following reactions:

Upon spotting with dilute caustic soda lye of say 10 per cent the green color turns brown, but on washing with water the original color comes back; upon treatment with nitric acid it changes to a yellow color; when spotted with other dilute acids or with a hydrochloric acid solution 'of stannous chlorid, however, it remains practically unchanged;

The following examples illustrate this invention and the manner of carrying the same into practical efiect, but the invention is not limited thereto:

Examples for dyeing.

1. For 20 kilos of wool.

One kilogram' of the green condensation product, which has preferably been brought into a fine state of division in the usual man- Application filed July 9, 1920. serial Ito. 395,075.

ner, is added to the dyebath (temperature 60 degrees to 65 degrees Centigrade) of 1000 litres of water containing a little anhydrous sodium hydrosulfite added in the form of powder. One and a half litres of 30 degrees lBaum caustic soda and 3 kilos of anhydrous sodium hydrosulfite (in powder) are next added and well stirred in. An addition of 10 kilos of calcined Glaubers salt causes the vat to draw more rapidly.

After working the whole in the bath for about 1%, hoursat about 65 degrees centi grade it is lifted, squeezed in the usual way, oxidized in the air, and then rinsed.

Ammonia or sodium carbonate may be used in place of caustic soda.

2. For 22.5 kilos of cotton yarn.

Six and three quarters kilos of a 10 per cent paste of the green condensation roduct are passed through a sieve into 1000 itres of water at ordinary temperature, 3 litres of 30 degrees Baum caustic soda and 2 kilos of anhydrous sodium hydrosulfite (powder) being added and well stirred. When the vat is uite ready for use, the wetted and centri uged yarn is placed therein and worked for about an hour. After the yarn has been lifted, it is developed in the air, well rinsed, and finished 0d in the usual way. The bath does not become completely exhausted; but this result may be attained by adding abou 20 kilos of calcined Glaubers salt.

3.1 07 .45 kilos of cotton yarn.

2.25 kilos green condensation product (10 per cent paste), 4.50 kilos sodium sulfid crystals,

34% kilos calcined soda stirring. This solution is added oughly stirring, the yarn is dyed in the boilished oif in the manner usual in the case of sulfur dyes.

Examples for padding. 1.

100 grams green condensation product (10 per cent paste).

150 grams gum thickening 1.1.

750 cc. water.

1000 grams.

The fabric is padded with the mixture 7 and dried.

Development is effected on the jigger, in a bath of 0.5 litre 40degrees Baum caustic soda. 300 grams anhydrous sodium (powder) hydrosulfite. 2.5 kilos calcined Glaubers salt. 100 litres water at 50 degrees to 60 degrees centigrade.

The goods are then rinsed, slightly acidified, rinsed again and soaped.

A white discharge can be produced on the padded fabric by means of Rongalite CL, just as with vat-dyed fabrics.

.30 grams green condensation product (10 per cent paste). 125 grams gum thickening 1.1.

25 grams ferrous sulfate.

3 grams tin salt. 10 grams 50 per cent lactic acid. 807 cc. water.

1000 grams.

Ewamples for printing. 1.

150 grams greencondensation product (10 per cent paste). 90 grams ferrous sulfate. 15 grams tin salt. 25-50 grams tartaric acid. 720-695 grams British-gum thickening 1.1.

1000 grams.

When printed, the fabric is dried, and then placed in a bath 19-2Q degrees Baum caustic soda at 75 degrees centigrade for about 2030 seconds, rinsed, neutralized in 3 degrees Baum sulfuric acid, rinsed and soaped.

300 grams dextrin thickening 1200 :800. 340 grams gum thickening 1.1. 1000 grams caustic soda (45 degrees Baum).

60 grams oil of turpentine.

After printing, the fabric is dried at 40 degrees to 45 degrees centigrade, then fixed for 5 minutes in arapid steamer (air being excluded), washed and soaped.

150 grams green condensation product (10 per cent paste). 100 grams glycerine. 150 grams carbonate of potash.

60 grams Rongalite C. dissolved in 50 grams water. 490 grams British gum thickening 1.1.

1000 grams.

The goods when printed are dried, then fixed for 5 minutes in the rapid steamer (air being excluded) washed, soured, washed again and soaped.

Colored discharge printing.

The fabric previously dyed-as usualwith dischargeable substantive dyestuffs, is printed with 200 grams green condensation product (10 per cent paste).

100 grams glycerine.

150 grams carbonate of potash.

100 grams Rongalite C.

450 grams British gum thickening 1.1.

1000 grams.

After printing, it is dried, fixed for about 5 minutes in the rapid steamer, with exclusion of air, washed, soured and soaped.

Now what we claim is- 1. The process of producing green dyeings on textile fiber by treating it with a reen condensation product of alpha nap thoquinone, insoluble in water, in the presence of a reducing agent and oxidizing theireduction product on the fiber so treated. f

2. The process of producing green dyeings on textile fiber by treating it with a green condensation product of alpha naphthoquinone, insoluble in water, after transforming it into a soluble leuco-compound by 10 with caustic soda solution it turns means of hydrosulfite and alkali, and oxidizing the leuco-compound on the fiber.

3. As a new article of manufacture a green textile fiber formed by treating "the fiber with a green condensation product of alpha naphthoquinone, insoluble in water, in the presence of a reducing agent, and oxidizing the fiber after the treatment, the characteristics of which are that'when treated brown, this color re-turning to green upon subsequent washing with water and that upon treatment with nitric acid it shows a yellow color and that the fiber when spotted with dilute acids or'with a hydrochloric acid solution of stannous ohlorid remains practically unchanged.

In testimony whereof we have hereunto set our hands.

VECTOR VEILMKBJER. HEINRICH Witt KRANMCHFELDT. 

